Splitscreen

Splitscreen is a multiplayer feature added into Doom in several ports made since the original release. It allows the screen to be split into several player views at once, thus enabling multiplayer on a single system.

Commercial ports with splitscreen support

 * Doom Classic (PlayStation 3)
 * Xbox
 * Xbox 360

Source ports with splitscreen support

 * 3DGE
 * Doom3D
 * Doom Legacy
 * Eternity Engine
 * ReMooD